Posterly

Create or revise academic conference posters in HTML/CSS and export print-ready PDFs. Use for poster design, layout edits, and print export.

431 stars 11 forksDocuments & Office Files

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add Chenruishuo/posterly --skill posterly

Manual install

git clone --depth 1 https://github.com/Chenruishuo/posterly.git /tmp/posterly
mkdir -p ~/.claude/skills
cp -r /tmp/posterly/. ~/.claude/skills/posterly

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# posterly — HTML/CSS Academic Poster Workflow

A poster is **one HTML file** styled for an exact print canvas, rendered to PDF via Playwright + Chromium. Iterate by **measuring**, not eyeballing — the screen preview lies; only `emulate_media("print")` at the correct viewport tells the truth.

## Mental model

```
   HTML (with @page { size: W H })
     │
     ▼  print-emulate Chromium at W×96 × H×96 px viewport
     │
     ▼  data-measure-role tags identify columns/hero/footer-strip
     │
     ├──→ tools/poster_check.py measure  (HARD GATE — spread < 5 px,
     │                                    gap-to-strip ∈ [30,50] px,
     │                                    intercard gap ∈ [12,50] px,
     │                                    poster bbox aligns to page
     │                                    within ±2 px)
     ├──→ tools/poster_check.py preflight  (LaTeX residue, math `<`, missing imgs)
     ├──→ tools/render_preview.py  (PDF + thumbnail)
     └──→ tools/poster_check.py verify-final  (PDF page count / dims / size)
```

The skill is venue- and lab-neutral by default. Compose a design direction from `templates/DESIGN-AXES.md` (Step 2.5), scaffold from the nearest template in `templates/README.md`, edit `:root` design tokens to match the locked direction, fill TODO placeholders with your paper's content.

## Canvas constants

| Constant | Value | Notes |
|---|---|---|
| `--u` (CSS unit) | print = `1mm`, screen = `1.6px` | Use `calc(N * var(--u))` for ALL sizing. |

Read the full skill on GitHub

Details

Skill name: posterly
Repository: Chenruishuo/posterly
License: AGPL-3.0
Repo updated: 27 October 2026

FAQ

What does the Posterly skill do?

Create or revise academic conference posters in HTML/CSS and export print-ready PDFs. Use for poster design, layout edits, and print export.

How do I install the Posterly skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add Chenruishuo/posterly --skill posterly. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Posterly popular?

It lives in Chenruishuo/posterly, which has 431 GitHub stars and 11 forks.

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